Release DataFusion `49.0.0` (July 2025)

[alamb]

Is your feature request related to a problem or challenge?

Tracking ticket for next release, also a place to track desired inclusions

Previous release will be https://crates.io/crates/datafusion/47.0.0 (June, 2025) so next major release would be late June or Early July 2025

Steps:

• Update version and changelog:
• Test with DataFusion Python:
• Test with DataFusion Comet
• Test with delta.rs:
• Test with LakeSail:
• Write upgrade guide:
• Test with parquet viewer
• Test with datafusion-materialized-views
• Voting Thread:
• Create ticket for next release:

Prior release tickets:

• 48.0.0: Release DataFusion 48.0.0 (June 2025) #15771

Changes to add to upgrade guide

These PRs made changes that deserve a mention in the upgrade guide

• [MAJOR] Equivalence System Overhaul #16217
• Update upgrade md for new unified config for sql string mapping to utf8view when we release datafusion 49.0.0 #16428
• Add compression option to SpillManager #16268

Features to mention in the blog (if they make it)

• Introduce Async User Defined Functions  #14837
• [EPIC] A collection of tickets for improving sorting larger than memory datasets / spilling sorts #15271
• TopK dynamic filter pushdown attempt 2 #15770
• Support integration with Parquet modular encryption #15216
• [MAJOR] Equivalence System Overhaul #16217
• Use Tokio's task budget consistently, better APIs to support task cancellation #16398

Bugs that need to be fixed

• Panic in datafusion_expr::window_state::WindowAggState::update #16308
• SortQueryFuzzer found a failing case on main #16452
• Wrong results when pushdown_filters is enabled (starting in 48.0.0) #16588
• Extended tests are failing #16595

Bugs that would be good to fix

Community Wishlist

• Format Date32 to string given timestamp specifiers #15361
• [Epic] Pipeline breaking cancellation support and improvement #16353
• Improve performance of ClickBench Q21 by removing the cast #16591